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Roger Wertheimer (1968). Conditions.

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  1.  61
    The Logical Vs. The Ontological Understanding of Conditions.Rögnvaldur Ingthorsson - 2008 - Metaphysica 9 (2):129-137.
    According to the truth-functional analysis of conditions, to be ‘necessary for’ and ‘sufficient for’ are converse relations. From this, it follows that to be ‘necessary and sufficient for’ is a symmetric relation, that is, that if P is a necessary and sufficient condition for Q, then Q is a necessary and sufficient condition for P. This view is contrary to common sense. In this paper, I point out that it is also contrary to a widely accepted ontological view of conditions, (...)
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